Background: The aortic and pulmonary allograft heart valves (AHV) are used in the cardiac surgery for replacing the impaired semilunar valves. They are harvested from donor hearts and cryostored in tissue banks. The expiration period was set to 5 years arbitrarily. We hypothesized ...

This paper deals with vibration of a bladed disk containing internal friction dampers (FD). The disk is considered as a weakly coupled discrete cyclic structure where the blades are moreover mutually coupled by means of friction couplings. The global dynamics of the structure is&#x...